Apparatus for increasing the intensity of flaming arcs



Jan. 26, 1937. M, E, LEmK 2,068,795

APPARATUS FOR INCREASING THE INTENSITY OF FLAMING ARCS Filed June 24,1936 2 Sheets-Sheet 20 I; E L

Q I 1-5 ATTORNEY.

Jan. 26, 1937. E GLElCK 2,068,795

APPARATUS FOR INCREASING THE INTENSITY OF FLAMING ARCS Filed June 24,1936 2 Sheets-Sheet 2 IN VEN TOR.

' ink-M6223 azezzir,

MT E I ATTORNEY.

Patented Jan. 26, 1937 UNiTED STATEfi PATENT OFFIQE APPARATUS FORINCREASING THE INTENSITY OF FLAMING ARGS Michael Edward Gleick,Archbald, Pa.

Application June 24, 1936, Serial No. 87,031

11 Claims.

reflection of light, also serve to prevent wavering of the tail flame.

2. A disc or plate of suitable shape placed directly in front of thetail flame.

3. A substantially cylindrical reflector member, the inside of which ispolished, for guiding the light rays toward the film aperture.

4. Reflector member shaped like the segment of a cone, arranged belowthe are for guiding light rays into the cylindrical reflector member.

5. A curved reflector member placed over the flaming arc.

Actual tests with a motion picture projector employing the above notedaccessories have shown an increase in the intensity of light of theorder of 20 or 25% with a given amount of power or, to put the matter inanother way, a projection apparatus using the features of this inventiongives the same amount of light as the ordinary projector, but with 20%less power.

The main features of the invention having been thus outlined, theinvention will now be described in connection with the accompanyingdrawings illustrating the present preferred embodiments of theinvention.

In these drawings:

Fig. 1 is a side view of a motion picture projection apparatus employingthe features of the present invention;

Fig. 2 is a longitudinal vertical section through Fig. 1;

Fig. 3 is a transverse cross section on the line 3--3 of Fig. 2;

Figs. 4 and 5 are enlarged, perspective views of the plates mounted nearthe tail flame;

Fig. 6 is a plan view of the same plates;

Fig. 7 is a side view of a modification; and

Fig. 8 is a perspective view showing a detail of Fig. '7.

Referring now to these drawings, in which similar reference charactersindicate similar parts, 2 indicates the base of a standard motionpicture projection machine having the usual reflector 4 and carbons Eand 8 for forming the arc, the tail flame of which is shown at IQ. Thesecarbons are mounted in standard mountings for automatic feed, etc, thedetails of which are known in the art and form no part of the pres entinvention.

Directly over the tail flame there is mounted a semi-cylindrical memberl2 which is mounted in any convenient way, as by rods 14 to the upperpart l6 of the projector. The member 12 is provided with a chimneyaperture l8 directly over the tail flame of the arc and directly belowthe regular chimney 20 of the projector; the inside of member i2 isbrightly polished, for reflecting light.

Suspended by rods 22 from member i 2 is a pair of plates 24, which areplaced on either side of the tail flame, in a vertical plane,substantially parallel to the longitudinal axis of the projector. Beds22 are secured to member i2 by nuts 22', the positioning of which rodsand nuts varies the setting of the plates 24. These plates 24 may be ofany suitable shape, here shown as sub stantially square, preferablybeing made of asbestos and coated with aluminum bronze for increasingtheir light reflecting power.

Also suspended from member 12, by a rod 25, is a third plate 28, whichis also preferably made of asbestos, coated with aluminum bronze, thisplate being directly in front of the tail flame. Rod 26 is secured bynut 29 to member l2, by means of which the setting of plate 26 may bevaried.

A circular cylindrical member 32, the inside of which is highlypolished, is mounted well to the right of the tail flame, the forwardend of member 32 fitting into the front portion 36 of the standardprojector. Light rays that might otherwise be lost are reflected by theinterior polished surface of member 32 into the converging barrel 36' ofthe projector, toward the film aperture.

Placed just below the flaming arc is a pair of swingable reflectors 40and 42, the inner surfaces of which are highly polished. Thesereflectors are shaped substantially like the segment of a cone I andslant upwardly, their right vertical edges substantially meeting theleft-hand end of the cylindrical member 32.

These reflectors may each be hingedly mounted reflectors 4n and 42 arehighly polished for reflecting light rays into the cylindrical member32.

With the features described, wavering of the arc is prevented by theside plates 24, these plates also, in cooperation with the plate 2%,aiding in the reflectors of certain of the light rays into the reflector4, which reflects them into the member 32. The inside polished surfacesof members I2, 40, and 42 prevent the escape of light rays and reflectthem also into member 32.

The foregoing features may be conveniently built into a standard motionpicture projector without making any changes in the structure andoperation of the projector itself, while the amount of light obtainablefrom the arc, with a given amount of power, is increased in theneighborhood of 20 or 25%.

Referring to the modification shown in Figs. '7 and 8, correspondingfeatures are indicated by corresponding reference characters. In Figs.'7 and 8, however, the plates 24', corresponding to the plates 24 ofFig. l, are carried by rods 5%, which bend at a right angle and areadjustably mounted in apertured bosses 52, being adjustably held thereinby set screws 54.

The other plate 28, corresponding to the plate 28, is supported by a rod5 which bends at a right angle, the horizontal reach of which isadjustably mounted in an apertured boss 58 by means of a set screw 60.

The above arrangement provides for a more ready adjustment of the plates24 and 28. Other features of the apparatus are as shown in connectionwith Figs. 1 and 2.

While the preferred embodiments of the invention have been illustratedin some detail, it should be understood that the invention is not to belimited to these details, but may be carried out in other ways, asfalling within the scope of the claims.

I claim as my invention:

1. Apparatus for increasing the amount of light from a flaming arc,comprising a pair of plates placed on either side of the flaming arc andin planes parallel to the beam of light from the arc, and means forvarying the setting of said plates with respect to the arc.

2. Apparatus for increasing the amount of light from a flaming arc,comprising a pair of substantially parallel vertically disposed plates,positioned on either side of the tail flame of the arc and in line withthe beam of light therefrom, said plates having bright light reflectingsurfaces, and means for varying the setting of said plates with respectto the arc.

3. Apparatus for increasing the amount of light from a flaming arc,comprising a reflector, a pair of substantially parallel plates placedon either side of the flaming arc and parallel to the axis of thereflector, and means for changing the vertical positioning of the plateswith respect to the arc.

4. Apparatus for increasing the amount of light from a flaming arc,comprising a reflector, and a pair of substantially parallel, verticallydisposed plates, positioned on either side of the tail flame of the arc,in planes parallel to the axis of the reflector, and means for changingthe horizontal positioning of the plates with respect to the arc.

5. Apparatus for increasing the amount of light from a flaming arc,comprising a pair of light refleeting plates made of asbestos coatedwith a metallic powder for reflecting light and placed on either side ofthe flaming arc and in planes parallel to the beam of light from theare.

6. Apparatus for increasing the amount of light from a flaming arc,comprising a reflector, and a pair of substantially parallel, verticallydisposed light-reflecting plates, made of asbestos coated with ametallic powder for reflecting light and positioned on either side ofthe tail flame of the arc, in planes parallel to the axis of thereflector, and means for varying the setting of said plates with respectto the arc.

7. Apparatus for increasing the amount of light from a flaming arc,comprising a pair of lightreflecting plates placed on either side of theflaming arc and in planes parallel to the beam of light from the arc anda third light-reflecting plate positioned medially with respect to saidpair of plates, and to one side of the arc- 8. Apparatus for increasingthe amount of light from a flaming arc, comprising a reflector, a pairof substantially parallel, vertically disposed, lightreflecting plates,positioned on either side of the tail flame of the arc, in planesparallel to the axis of the reflector and a third light reflecting platepositioned in a vertical plane, to one side of the are, on the sideopposite the reflector.

9. Apparatus for increasing the amount of light from a flaming arc,comprising a reflector on one side of the are, a substantiallycylindrical'memher, the interior of which is bright for reflecting lightand both ends of which are open, placed with its axis parallel to theaxis of the reflector and on the other side of the arc and outwardlyswingable curved reflector means, having an interior surface slantingtoward one end of cylindrical member, and positioned below the arc, fordirecting light toward said cylindrical member. I

10. Apparatus for increasing the amount of light from a flaming arc;comprising a reflector to the rear of the arc, a pair of substantiallyparallel, vertically disposed plates, positioned on either side of thetail flame of the arc, in planes parallel to the axis of the reflector,a semicylindrical reflector member positioned over the arc and over saidvertically disposed plates and a cylindrical member, the interior ofwhich is polished for reflecting light, positioned in front of the arc,with its axis parallel to the axis of the reflector.

11. Apparatus for increasing the amount of light from a flaming arc,comprising a reflector to the rear of the arc, a pair of substantiallyparallel, vertically disposed plates, positioned on either side of thetail flame of the arc, in planes parallel to the axis of the reflector,a cylindrical member, the interior of which is polished for reflectinglight, positioned in front of the arc, with its axis parallel to theaxis of the reflector, and hinged reflector means substantiallysemicylindrical in shape, but having an interior surface incliningtoward one end of said cylindrical member, and positioned below the arc,for reflecting light into said cylindrical member.

MICHAEL EDWARD GLEICK.

CERTIFICATE OF CORRECTION.

Patent No. 2,068,795. January 26, 193'] MICHAEL EDWARD GLEICK.

It is hereby certified that error appears in the printed specificationthe above numbered patent requiring correction as follows: Page 1, firstcolumn, line 20, for the word "member" read members; page 2, firstcolumn, line 6, for "reflectors" read reflection; and that the saidLetters Patent should be read with these corrections therein that thesame may conform to the record of the case in the Patent Office.

Signed and sealed this 2nd day of February, A. D. 1937.

Leslie Frazer (Seal) 1 v Acting Commissioner of Patents.

CERTIFICATE OF CORRECTION.

Patent No. 2,068,795. January 26, 1957.

MICHAEL EDWARD GLEICK.

It is hereby certified that error appears in the printed specificationof the above numbered patent requiring correction as follows: Page 1,first column, line 20, for the word "member" read members; page 2, firstcolumn, line 6, for "reflectors" read reflection; and that the saidLetters Patent should be read with these corrections therein that thesame may conform to the record of the case in the Patent Office.

Signed and sealed this 2nd day of February, A. D. 1937.

7 Leslie Frazer (Seal) J Acting Commissioner of Patents.

